* Change QuoteRequestor logger parameters to conform to pino logging
library, duplicating (one of) their LogFunction prototype interfaces for
our purposes here. With this, every log emission now includes BOTH a
human-readable message AND a JSON object. Also, this pattern has been
applied to both the error logger and the info logger.
* Do better handling of Axios errors when logging them. Before we were
(a) logging errors in a separate log entry than the message that
explains it, and (b) dumping the whole error object to the log entry,
which was resulting in an object so massive that pino/Kibana was
splitting it into 3 separate entries. Now, we (a) follow the pattern
described in the previous bullet, which puts the error object and the
human readable message into the same log entry, and (b) we check to see
if an error object is Axios-specific, and if so then we use the
AxiosError.toJSON() method to strip out the irrelevant properties.
* Log a uniform maker response metric, with maker endpoint URL, status
code, and latency, for both successful cases and erroneous ones.
(Before, we were only doing this for successful cases.)
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